EPAuto Engine Air Filter for Toyota Prius 2004-2009 GP159 — Direct-Fit, OE-Compatible Replacement

EPAuto GP159 (CA10159) is a direct-fit replacement engine air filter designed to restore airflow and engine protection on Toyota Prius models from 2004 through 2009.

If your Prius is due for routine maintenance, swapping in a fresh engine air filter is one of the quickest ways to maintain engine efficiency and help keep contaminants out of the intake. The EPAuto GP159 is built to match the fit and function of common OE and aftermarket references—sold as a replacement for Toyota part 17801-21040 and compatible with FRAM CA10159—so installation is straightforward and fits the original airbox without modification.

How will this filter affect my Prius’s day-to-day performance?

Replacing a clogged or worn air filter restores proper air flow to the engine, which helps return throttle response and maintains designed combustion characteristics. While results depend on vehicle condition, a fresh filter supports consistent performance under normal driving.

• Direct-fit for Toyota Prius 2004–2009—no trimming required
• Designed to reduce airborne dirt reaching the intake
• Helps maintain stable engine air supply for consistent driving

When should I change the EPAuto GP159 air filter?

Service intervals vary by driving conditions; EPAuto recommends change roughly every 12,000 miles under typical use. If you drive in dusty, off-road, or heavy stop-and-go conditions, inspect the filter more frequently and replace it sooner when visibly dirty.

• Baseline recommendation: replace every 12,000 miles
• Check earlier if you notice reduced performance or heavy soot/dust
• Simple visual inspection can identify a clogged filter

Is the GP159 compatible with my existing parts and references?

The EPAuto GP159 is made to match the dimensions and sealing of Toyota part number 17801-21040 and is compatible with FRAM CA10159. It’s intended as a direct replacement so you can use your factory airbox and mounting points without alteration.

• Replaces Toyota genuine part# 17801-21040
• Compatible with FRAM CA10159 reference
• Engineered for direct-fit installation in the original airbox

Are there recommended complementary filters or parts?

For complete cabin and engine air management, consider replacing the cabin air filter when you replace the engine air filter. EPAuto suggests pairing the GP159 with cabin filter CP846 (CF9846A / AUTO-CF-005) to keep both intake systems fresh at the same time.

• Suggested cabin filter: EPAuto CP846 (CF9846A / AUTO-CF-005)
• Replacing both filters improves overall air quality and comfort
• Simultaneous replacements streamline routine maintenance

Who is this for: The EPAuto GP159 (CA10159) is aimed at Toyota Prius owners (model years 2004–2009), DIY mechanics, and service shops that want a reliable, direct-fit engine air filter alternative to OE or FRAM references. Choose this filter if you want a straightforward replacement that matches factory fitment, helps protect the intake from dirt, and follows the typical 12,000-mile service interval for routine maintenance.